Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853690 | Security alarm process and apparatus | Hans-Dieter Mayer | 1989-08-01 |
| 4806854 | Current draw and power consumption display circuit | Hans-Dietrich Mayer | 1989-02-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853690 | Security alarm process and apparatus | Hans-Dieter Mayer | 1989-08-01 |
| 4806854 | Current draw and power consumption display circuit | Hans-Dietrich Mayer | 1989-02-21 |